Schneider 140CRA21220 DIO Drop Interface

The Schneider Electric 140CRA21220 is a Distributed I/O (DIO) Drop Interface Module, part of the Modicon Quantum automation platform. It is specifically designed to connect a Quantum CPU to remote I/O racks via the S908 Remote I/O (RIO) network, enabling a distributed control architecture for large and complex industrial automation systems.

As a high-performance drop interface, the 140CRA21220 allows for reliable and high-speed communication between the controller and remote devices. This functionality makes it ideal for industries that require control over expansive geographic areas or where decentralizing I/O is beneficial for efficiency, maintainability, and scalability.

The module’s robust hardware, modular design, and seamless integration with Schneider’s Unity Pro / EcoStruxure Control Expert software platform ensure consistent operation in critical applications such as power plants, chemical processing, water treatment, and manufacturing.

Technical Specifications

Product Applications

The 140CRA21220 is well-suited for distributed industrial automation systems where remote equipment must be connected efficiently and securely to a central PLC. Its applications span across multiple critical industries:

• Oil & Gas Production

  Connects remote I/O cabinets in pipeline compressor stations, offshore rigs, and refineries to the central control system.

• Power Generation

  Interfaces distributed turbine, boiler, and auxiliary systems with a central Quantum CPU.

• Water and Wastewater Treatment

  Distributes I/O to remote pump stations, treatment basins, and monitoring systems.

• Chemical and Petrochemical Plants

  Integrates isolated process skids and safety instrumented systems (SIS) with central logic controllers.

• Pharmaceutical Manufacturing

  Provides remote I/O access for validated cleanroom environments and distributed process areas.

• Food and Beverage Industry

  Connects control panels across expansive bottling and packaging lines.

Key Advantages

• High-Speed Communication

  Offers reliable and fast I/O data exchange over the S908 network with up to 1.5 Mbps transmission speed.

• Remote I/O Scalability

  Supports extensive distributed architectures, making it ideal for large facilities and geographically spread systems.

• Simplified Wiring and Installation

  Reduces cabling complexity and installation time by allowing I/O modules to be located closer to field devices.

• Robust Diagnostic Feedback

  LED indicators and integrated software diagnostics simplify troubleshooting and improve maintainability.

• Industrial-Grade Reliability

  Designed to withstand harsh environmental conditions including vibration, humidity, and temperature fluctuations.

• Full Integration with Schneider Ecosystem

  Seamlessly integrates with Modicon Quantum CPUs and EcoStruxure Control Expert for centralized configuration and control.

• Compact and Lightweight Design

  Saves space in control cabinets and is easy to handle during installation and maintenance.

Frequently Asked Questions (FAQ)

1. What is the function of the 140CRA21220 module?

It acts as a drop interface that connects a Modicon Quantum CPU to remote I/O racks via the S908 network.

2. What type of cable is used for RIO communication?

It uses a 75 Ohm BNC coaxial cable to communicate over the S908 network.

3. How many drops can be connected using this module?

Each module supports one drop. Multiple drops require additional interface modules.

4. Is the 140CRA21220 compatible with all Quantum CPUs?

Yes, it works with all Quantum CPUs that support the S908 RIO architecture.

5. Does it support redundant communication?

Redundancy is not built into this module but can be configured in the overall architecture using appropriate redundancy methods.

6. How is the module powered?

It receives 5 V DC power from the Quantum backplane.

7. What diagnostic information is available?

LED indicators show module status, communication activity, and I/O health. Additional diagnostics are available via software.

8. Is the module hot-swappable?

No, it should be inserted or removed only when the system is powered down.

9. Can the module operate in hazardous environments?

Yes, it carries certifications including ATEX and can operate in demanding industrial conditions.

10. What software is used to configure the module?

It is configured using Schneider Electric’s Unity Pro or EcoStruxure Control Expert.